Method and apparatus for making belts



H. M. LAMBERT.

METHOD AND APPARATUS FOR MAKING BELTS.

APPLICATloN FILED DEC. 24, V919! 1,370,597, Patented Mar. 8, 1921.

I INVENTOR g@ I amberb.

UNITED srA'ilsgsmgPATENr OFFICE.

HENRY M. LAMBERT, or'roRTLAND, OREGON.

METHOD yAlan APPARATUS'FQR MAKING BELTS.

n To all whom t may concern Be it known -that l, a citizen oftheUnitedStates,at present residing at Portland, inthe county .of yMultnomah andState of Oregon, have invented anew andlmproved Method and Apparatus forMaking Belts, yof which'the following is a'specication. f A

, My invention relates tothe art of manufacturing vstretchless belts andit particu y larly has for its yobject to "provide a conven-A ient andefe'ct-ive methodand apparatus for their approximate limit. ofelongation, Whilekk being laid and vulcanizing the' cords andmanufacturingy belts, which belts are eonl structed of alternate. layersof rubberizedy fabric and cords. f

' In carrying out my invention, I simultaneously'lay betweenspaced'strips o"i".i=ul r beiized fabric, a layer of cordsextendinginparallelism, the cords being `either individual or held together bytransversely woven lightcords or strands, placing the cords under suchtension as to stretch the same `to fabric strips together, While undertension.y In its more detailed nature, theinvention includes thosenovelrsteps of manufacture and the novel detailsof construction and ar-5 rangement of parts of the apparatus employed in carrying out theinvention, all of which Will be first fully described, then spe cicallypointed out in thel appended claims, reference being had to theaccompanying drawings, in' Which z Figure 1 is a diagrammaticlongitudinalv section illustrating anarrangement of apparatusada'ptedtothe performance of my method.

Fig. 2 is a detail view of a portion of the y threads.

reference indicate like parts in all of the In the drawingsinl Whichlike numerals of figures, l represents the vulcanizing press which maybe of the usual construction embodying a baseer support thatl carries asuitable bed 2 to coperate With the pressing head 3, the latter beingdesigned to be pressed down toward the bed 2 by any atr 5 to providesteam jackets, whereby the suitable mechanism, as for instance, camlevers 4.

The bed 2 andhead 3 may befchambered i i Specification of LettersPatent.

HENRY M. LAMBnnTg,

tlemperatureof thefparts maybe maintained for vulcanizing purposes. i

6. and l7 designate the rolls carrying rubberized fabric strips 8. 9indicates an idler designates the drum or reel from which the cords aretaken. i

1 l y y ratented.i\ia1.s, 1921.. Application ined December 24,1919.seriaiNo. 347,093. f l i n n roller over which the lower strips pass. 10

VIt should be understood that 'when the 1 cords yare heldl together by'transversely woven threads, one reel 10 issuflicient, when the 'cordsare laid individually, a separate reel'for each kstrand ofcordniaybelemployed. The reels lO'carrying the cords are provided With suitabletension devices 11, whereby the cords may be yheld under maximumtensioin'while beingflaid. 12 designates the cords and 13 thetransyverse threads holding the cords together vides for laying thefabric layers 8 with the cords 12 kbetween them and simultaneouslyWinding the saine on the take-up reel 14. y

By adjustingy the tension device 11, the

drag on the reel 10 may be regulated so as to place the cords 12 under astretch approxif mating their limitof elongation. l

The head 3L is then lowered and the section of belting contained betweenthe head 3 and bed 2 is vulcanized` after which the head 3 is raised, inany suitable manner, as for instance by springs 16, and the vulcanizedsection of belt Wound on the reel 14,

f after which the next section is vulcanized in the same manner and soon until the desired y lengtho'f belt has been produced.

` As the chief strength ofthe belt is ob tained by use of the cords andas the cords and fabric strips are vulcanized togetherV its longitudinaldirection but, of course, the degree of tension applied to the fabricstrips 8 need only be suiicient to take up the slacl; in such stripsduring the laying process.

While I have. shown an apparatus and described a process of manufactureproducing a belt with but a single layer of cords, it is quite obviousthat the number of cord layers and fabric strips may be increased asdesired in order to make a belt of the proper strength and size.

From the foregoing description taken in connection with the accompanyingdrawings, it is thought the invention will be clear to those skilled inthe art and l c' e it un derstood that changes in the dot s nmy be madeWithout departing from the spirit of the invention or the scope ef theclaims.

1. rlhe method of manufacturing belts which consists in taking alternatela r rubberized fabric and cords, laying laye; of cords between oppositela rs oi fabric strips and stretching the cords to their approximatelimit of elongation, While being laid, and vulcanizing the whoie int-o aunitary mass, While said cords are held stretched.

2. The method of manufacturing belts which consists in placing on alayer of rnbberized fabric a layer of cords consisting of a plurality ofstrands laid side by side in parallelism, placing over said cordsanother layer of rubberized fabric, stretchin said cords to theirapproximate limit of e engation, holding the same stretched andvulcanizing the mass, while the cords are held stretched whereby,through the process of vulcanizing the parts, the parts Will be unitedin an individual structure and the cords maintained in their stretchedcondition.

3. An apparatus for manufacturing belts comprising a Vulcanizing press,a take-up reel, a pair of feed reels adapted to contain strips of fabricand a third feed reel adapted te centaiu cord strands, said reels beingarranged to deliver the fabric and cord in alternate layers to thevulcanizing press, the

said take-up reel being arranged to receive f the combined layers offabric and cord from the Y'ulcani'lzing,r press, means for turning thetalrefup reel, and means for retarding the feed of the cord carryingreel, whereby to place the cord under tension, as the layers are passedthrough the vulcanizing press, whereby the mass may be vulcanized into aunitary structure, while the cord is held under tension, substantiallyas shown and described.

HENRY M. LAMBERT.

